US2024375090A1PendingUtilityA1
CATALYST, PRODUCTION METHOD FOR CATALYST, AND PRODUCTION METHOD FOR alpha,beta-UNSATURATED ALDEHYDE AND/OR alpha,beta-UNSATURATED CARBOXYLIC ACID USING SAME
Est. expiryJan 27, 2042(~15.5 yrs left)· nominal 20-yr term from priority
C07C 45/28B01J 37/031B01J 37/0009B01J 35/40B01J 35/30C07C 51/252B01J 23/8876B01J 37/08B01J 37/0045B01J 23/002B01J 2523/54B01J 2523/53B01J 2523/842B01J 2523/68B01J 2523/845B01J 2523/15B01J 37/04B01J 23/85C07C 51/25C07C 45/34C07C 57/04C07C 47/22C07C 45/35C07B 61/00B01J 23/887
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Claims
Abstract
An object of the present invention is mainly to provide a catalyst with which an α,β-unsaturated aldehyde and/or an α,β-unsaturated carboxylic acid can be produced with a high selectivity. Provided is a catalyst used for producing, by an oxidation reaction of a hydrocarbon, a corresponding α,β-unsaturated aldehyde and/or α,β-unsaturated carboxylic acid, and the catalyst contains molybdenum, bismuth, and cobalt, and satisfies the following Formula (I-1): (x2−x1)/σ1≤1.5 (I-1) In Formula (I-1), x1, x2, and σ1 are values obtained by binarizing a reflected electron image of the catalyst, which is obtained using a scanning electron microscope (SEM) at an accelerating voltage of 15 kV, into black and white and subsequently performing an energy dispersive X-ray spectroscopy (EDS) analysis; x1 represents a bismuth concentration [% by mass] in black parts; x2 represents a bismuth concentration [% by mass] in white parts; and σ1 represents a standard deviation of the bismuth concentration in the black parts.
Claims
exact text as granted — not AI-modifiedWhat is claimed is:
1 . A catalyst used for producing, by an oxidation reaction of a hydrocarbon, a corresponding α,β-unsaturated aldehyde and/or α,β-unsaturated carboxylic acid,
wherein the catalyst comprises molybdenum, bismuth, and cobalt, and satisfies the following Formula (I-1):
(
x
2
-
x
1
)
/
σ
1
≤
1.5
(
I
-
1
)
wherein, x1, x2, and σ1 are values obtained by binarizing a reflected electron image of the catalyst, which is obtained using a scanning electron microscope (SEM) at an accelerating voltage of 15 kV, into black and white and subsequently performing an energy dispersive X-ray spectroscopy (EDS) analysis; x1 represents a bismuth concentration [% by mass] in black parts; x2 represents a bismuth concentration [% by mass] in white parts; and σ1 represents a standard deviation of the bismuth concentration in the black parts.
2 . The catalyst according to claim 1 , wherein the x1, x2, and ad satisfy the following Formula (I-2):
(
x
2
-
x
1
)
/
σ
1
≤
1
(
I-2
)
3 . The catalyst according to claim 1 , wherein the x1 and x2 satisfy the following Formula (I-3):
x
2
-
x
1
≤
3
.
5
(
I
-
3
)
4 . The catalyst according to claim 1 , wherein the σ1 is 1.5 or more.
5 . The catalyst according to claim 1 , wherein, in an X-ray diffraction pattern, when the intensity of a maximum peak (peak A) in a range of 2θ (X-ray diffraction angle)=26.5°±0.3° is defined as IA and the intensity of a maximum peak (peak B) in a range of 2θ=28.0°±0.3° is defined as IB, a value of IB/IA is 0.08 or more.
6 . The catalyst according to claim 5 , wherein the value of IB/IA is 0.08 to 0.5.
7 . A catalyst used for producing, by an oxidation reaction of a hydrocarbon, a corresponding α,β-unsaturated aldehyde and/or α,β-unsaturated carboxylic acid,
wherein
the catalyst comprises molybdenum, bismuth, and cobalt, and
in an X-ray diffraction pattern, when the intensity of a maximum peak (peak A) in a range of 2θ (X-ray diffraction angle)=26.5°±0.3° is defined as IA and the intensity of a maximum peak (peak B) in a range of 2θ=28.0°±0.3° is defined as IB, a value of IB/IA is 0.08 to 0.5.
8 . The catalyst according to claim 6 , wherein the value of IB/IA is 0.13 to 0.3.
9 . The catalyst according to claim 1 , wherein, in an X-ray diffraction pattern, when the intensity of a maximum peak (peak A) in a range of 2θ (X-ray diffraction angle)=26.5°±0.3° is defined as IA and the intensity of a maximum peak (peak C) in a range of 2θ (X-ray diffraction angle)=29.1°±0.3° is defined as IC, a value of IC/IA is 0.05 or more.
10 . The catalyst according to claim 1 , having a composition represented by the following Formula (II):
Mo a Bi b Fe c Co d X e Y f Si g O h (II)
wherein, Mo, Bi, Fe, Co, Si, and O represent molybdenum, bismuth, iron, cobalt, silicon, and oxygen, respectively; X represents at least one element selected from the group consisting of nickel, calcium, magnesium, niobium, tungsten, antimony, phosphorus, and titanium; Y represents at least one element selected from the group consisting of cesium, lithium, sodium, potassium, rubidium, and thallium; a, b, c, d, e, f, g, and h represent atomic ratios of the respective elements; a=12, b=0.01 to 3, c=0 to 5, d=1 to 12, e=0 to 8, f=0.001 to 2, and g=0 to 20; and h represents an atomic ratio of oxygen that is required for satisfying the valences of the respective elements.
11 . A catalyst production method, which is a method of producing the catalyst according to claim 1 , and comprises the following steps (i) to (iii):
(i) the step of mixing a solution or slurry (liquid A) comprising molybdenum and bismuth with a solution or slurry (liquid B) comprising cobalt to prepare a slurry (liquid C); (ii) the step of performing a dispersion treatment of the liquid C to prepare a slurry (liquid D); and (iii) the step of drying the liquid D to obtain a dry product.
12 . The catalyst production method according to claim 11 , wherein, in the step (ii), the liquid C is circulated for 5 minutes to 10 hours during the dispersion treatment of the liquid C.
13 . The catalyst production method according to claim 12 , wherein, in the step (ii), the liquid C is circulated using a circulation pump.
14 . The catalyst production method according to claim 11 , wherein, in the step (ii), the liquid D is prepared by maintaining the resulting slurry at 60° C. or higher for at least 20 minutes after the dispersion treatment of liquid C.
15 . A method of producing an α, β-unsaturated aldehyde and/or an α,β-unsaturated carboxylic acid, the method comprising the step of oxidizing a hydrocarbon in the presence of the catalyst according to claim 1 .
16 . A method of producing an α, β-unsaturated aldehyde and/or an α,β-unsaturated carboxylic acid, the method comprising the step of oxidizing a hydrocarbon in the presence of a catalyst produced by the method according to claim 11 .
17 . A method of producing an α, β-unsaturated carboxylic acid, the method comprising the step of oxidizing an α,β-unsaturated aldehyde produced by the method according to claim 15 .
18 . A method of producing an α, β-unsaturated carboxylic acid ester, the method comprising the step of esterifying an α,β-unsaturated carboxylic acid produced by the method according to claim 17 .Join the waitlist — get patent alerts
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